TY - JOUR
T1 - Enhancement of tunnel magnetoresistance in ferromagnet/granular/ferromagnet junction related to the Coulomb blockade effect
AU - Kubota, Hitoshi
AU - Fukumoto, Yoshiyuki
AU - Thamrongsing, Siripongsakul
AU - Ando, Yasuo
AU - Miyazaki, Terunobu
AU - Yu, Chung
PY - 2000/5/1
Y1 - 2000/5/1
N2 - We study tunnel magnetoresistance effect in ferromagnet/granular/ferromagnet tunnel junctions in the Coulomb blockade regime. The granular consists of a Al-O/Co/Al-O/Co/Al-O multilayer, which was sputtered sequentially. The magnetoresistance (MR) ratio and the resistance (Rs) of the junction increased with decreasing bias voltage at low temperatures. The MR ratio and Rs were calculated based on the theory proposed by Takahashi and Maekawa [S. Takahashi and S. Mackawa, Phys. Rev. B 90, 1758 (1998)]. Although the variation of these values on bias voltage was different from experimental results, the calculated MR ratio in the Coulomb blockade regime agreed well with the maximum value measured.
AB - We study tunnel magnetoresistance effect in ferromagnet/granular/ferromagnet tunnel junctions in the Coulomb blockade regime. The granular consists of a Al-O/Co/Al-O/Co/Al-O multilayer, which was sputtered sequentially. The magnetoresistance (MR) ratio and the resistance (Rs) of the junction increased with decreasing bias voltage at low temperatures. The MR ratio and Rs were calculated based on the theory proposed by Takahashi and Maekawa [S. Takahashi and S. Mackawa, Phys. Rev. B 90, 1758 (1998)]. Although the variation of these values on bias voltage was different from experimental results, the calculated MR ratio in the Coulomb blockade regime agreed well with the maximum value measured.
UR - http://www.scopus.com/inward/record.url?scp=5244313895&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=5244313895&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:5244313895
VL - 87
SP - 5212
EP - 5214
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 9 II
ER -